Oiler for thread cutting dies



Aug. 20, 1940. R. SCHUBERT OILEF. FOR THREAD CUTTING DIES Filed Sept.27, 1939 INVENTOR ATT RNEY Patented Aug. 20, 1940 1 UNITED STATE PATENTOFFiCE This invention relates to an oiler for thread cutting dies.

The principal object of this invention is the provision of a simplifiedmeans for conveying "lubricating oil to thread cutting dies positionedin a stock as commonly used in cutting threads on tubular material.

It is well known that the ordinary thread cutting dies require almostcontinuous lubrication during such times as threads are actually beingcut into tubular material. A common form of thread cutter is reported inthis disclosure wherein a pair of oppositely disposed handles are usedto turn the stock, which stock carries the actual cutting dies. Theinvention resides in the adaption made of one of the handles which iscommonly turned into the die carrying stock, the said handle beingslightly modified by the addition of a relatively few parts of which, inconnection with the hollow handle itself, form a practical andconvenient and inexpensive oiling system.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseem-- bodiment of the invention herein disclosed, can be made within thescope of What is claimed without departing from the spirit of theinvention.

The invention is illustrated in the accompanying drawing, wherein thefigure is a side elevation with parts in cross section and parts brokenaway, showing approximately one half of the die carrrying stock togetherwith a tubular handle aflixed therein, the handle carrying the oilingequipment.

By referring to the drawing it will be seen that the die carrying stock8 is provided with the usual movable thread cutting dies 2, provided ateach of its sides thereof (only one side being shown in the drawing)with a threaded socket 3 adapted to receive and retain a tubular handle4. This tubular handle 4 is usually provided with a cap threaded uponits outermost end, which cap has been modified to form a cap 5 having acircular.

depression l5 formed in its outermost end. A centrally positionedopening I is formed in the circular depression 6 of the cap 5. Anoperating button 8 taking the form of a tubular member, the outermostend of which is closed and the innermost end of which is provided with arelais positionedpartially. within it. The opposite end of thisoperating rod 10 is provided with a flanged gasket l l which ispositioned thereon by a pair of nuts I2, this flanged gasket ll beingpositioned within the tubular handle 4 in the end thereof adjacent thethreaded socket 3. Po sitioned in this threaded socket 3 there is acheck valve assembly l3 which takes. the form of a tubular member havinga ball valve in its outermost end, and provided with a relatively large10 By referring again to the outermost end of the tubular handle 4 itwill be seen that a suitable gasket i9 is provided and positionedbetween the circular depression of the cap 5 and the annular flange 9 ofthe operating button 8. This gasket I9 serves to prevent any lubricantfrom escaping past the operating button 8.

It will be seen that in utilizing the lubricant applying means it isonly necessary that the operating button 8 be depressed slightly whichwill, in turn, move the operating rod l0 and the flexible gasket I Iwill, in turn, act as a piston and force the lubricant outwardly throughthe check valve l3 and into the lubricant delivery tube l1 and out ofthe lubricant delivery opening l8. In

order that the action may be repeated from time to time, it is necessarythat spring means be provided toreturn the piston mechanism and theoperating button to operating position. This is provided in the form ofa coil spring 20 positioned around and about the innermost end of the.operating rod It and the check valve l3 and bearing against the largeannular flange I4 thereof. The positioning of this coil spring 20provides for the positive positioning of the various operating partsdespite any variances in the assembly and positioning of the handle 4and cap 5 in connection with the threaded socket 3.

By referring again to the outermost end of the handle 4 it will be seenthat the circular depression 6 in the cap 5 therein provides adequateprotection for the operating button 8 positioned therethrough thusprotecting it against mutilation due to striking against foreignobjects.

It will thus be seen that a practical and inexpensive lubricating meanshas been devised which utilizes only a few additional parts inconnection with the ordinary tubular handle commonly associated with diecarrying stocks. It will also be seen that the lubricant may be readilyreplenished by simply removing cap 5 of the assembly and filling theinterior of the handle 4 with lubricant What I claim is:

1. A manually operated lubrication means p0- sitioned in a hollow handleof a die cutting tool, the said means comprising a cap for said handle,said cap carrying an operating button, an operating rod having apiston-like washer positioned on one end thereof the other end of thesaid rod' extending to the outermost end of the said hollow handle, andadapted to be moved by the said operating button, a check valvecomprising a tubular member having a ball valve positioned in one endthereof and a large annular flange formed on the other end thereof, saidcheck valve positioned in said tool adjacent said hollow handle, a coilspring positioned between said check valve and said operating rodtogether with a tube communicating with the said check valve andterminating at a point adjacent to said dies, said cap being countersunk so as to provide protection to the operating button.

2. Means for converting a die carrying stock having a pair of hollowhandles affixed therein into a self-lubricating tool, said meanscomprising the utilization of one of the hollow handles as an oilreservoir, a piston positioned within said hollow handle, the saidpiston comprising a rod carrying a suitable gasket on one end thereofthe other end of said rod extending to the outermost end ofsaid hollowhandle, a cap positioned on the outermost end of the said hollow handle,an operating button positioned in said cap and adapted to contact thesaid rod, a check valve positioned in the portion of the stock adaptedto receive the hollow handle, the said check valve comprising acylindrical member having a

